The Botany of Iceland - 01.12.1942, Blaðsíða 116

114
JOHS. GRONTVED
Cupressaceae.
32. Juniperus communis Linn., Sp. pl. ed. I (1753) p. 1040.
J. communis, K. & M., 1770, p. 211.—Juniþerus nana, Willd., Babington, 1871,
p. 329.—J. alþina Clus., Gronlund, Isl. Fl., 1881, p. 133.—J. communis L.,
Stefánsson, Fl. Isl., ed. 1, 1901, p. 15.—Ibid., ed. 2, 1924, p. 16.—C.H.O.,
Fl. arct., 1902, p. 16,—O. & Gr., 1934, p. 10.
Flora Dan. tab. 1119, and tab. 2739 (var. nana).
Icelandic : Einir. Danish : Ene. English : Juniper.
In Iceland the low, depressed form with appressed leaves, var. nana (Willd.)
Loud. is the form most commonly met with. It seems to flower and fruit very well
in Iceland.
In some parts of Iceland the Juniper may be regarded as frequent, while in other
parts it occurs rather sparsely, and may even be called rare. In E., N., N.W. and S.W.
it is frequent. In S. it has hitherto been found in a few places only. In the central
plateau I found it at Hvítárvatn on south slopes in several places, and at the foot
of Bláfell.
Life-form : N.
On heaths, in Betula and Salix copses, lava-fields, fell-field.
Flor.: VI—VII. fr. mat. VII.
Max. height: c. 45 cm; average length about 20 cm.
Geogr. area : North America.—Greenl. : W. 60°—69°23'. E. 60°—68°20'.—Eur.:
Fær.; E.S.I.; throughout Eur., in the south only in the mountains.—Asia: Northern
and western Asia, Kamchatka, Sakhalin.—N. Africa.
Pinaceae.
Larix sibirica Ledeb.
Stefánsson, Fl. Isl., ed. 2, 1924, p. 17.
Cultivated, and in some places it seems to thrive very well.
Pinus Mugo Turra (Syn. P. montana Mill.) and several other species of Conifers
are also cultivated.
Sparganiaceae.
33. Sparganium affine Schnizlein, Dissert. bot. Typhae (1845) p. 27.
5. natans, K. & M., 1770, p. 210.—Babington, 1871, p. 334.—Bennet, 1886,
p. 70.—Stefánsson, Fl. ísl., ed. 1, 1901, p. 64.—Ibid., ed. 2, 1924, p. 72.—
C.H.O., Fl. arct., 1902, p. 18.—O. & Gr., 1934, p. 10.
Flora Dan. Suppl. tab. 171.
Icelandic: Trjónubrúsi. Danish : Smalbladet Pindsvineknop. English : Floating Bur-
reed.
In the southwestern parts in several places, frequent at Mývatn and scattered in
N., E. and S.E., see fig. 30.
Life-form: HH (Hydrophyte).
In smaller lakes, ponds and ditches.
Max. length : 75 cm ; average : 40 cm.
Flor. VII ; fr. mat.' VIII.